Electric locomotive



(No Model.) 1 2 sn000s- 011000 2.l y E. A. SPE-REY.

ELECTRIC LOGOMOTIYE. l No. 502,020. f Patented'J1'11-y20'1003;

UNITED Q STATES PATENT OFFICE.

ELMER A. SPERRY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SPERRY ELECTRICRAILWAY COMPANY, OF CLEVELAND, OHIO.

ELECTRIC LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent No. 502,020, dated July 25,1893.

Application tiled October 23, 1891. Serial No. 409,583. (No model.)

To all whom it may concern.-

Be it known that I, ELMER A. SPERRY, a citizen of the United States,residing at Chicago, in the county of Cook and State of lilinois, haveinvented certain new and useful Improvements in Dynamos and Motors, ofwhich the following is a specification.

My invention relates to the construction of electric machines, moreespecially to electric motors, and it consists in certain details ofconstruction of the armature journal, mounting of the armature,construction of the body, or field magnet frame, support of the fieldcoil and mounting, especially when adapted as a street car motor.illustrated in the accompanying drawings, in which- Figure 1 is a sideelevation, partly in section. Fig. 2 is a View at right angles to-Fig.1, showing axle in Yfore-ground. Fig. 3 shows section-of armature corewith wire band. Fig.-

4 is a detail. Figs. 5 and 6 show different ways ofy making bands uponthe armature. Fig'. 7 shows the alternate form of ldevice to secure aparallel movement.

Like letters of reference indicate similarl parts throughout the severalviews.

A indicatesa U-shaped iron forging or casting, preferably the former. Aillustrates a similar portion covering the top of the U, presenting thepole piece A downward therefrom. The pole-piece B is supported .by theU-shaped part A. The coil` of the field magnet is wound on and supportedbetween the pole piece A and cap A and is indicated by B'.

B is a hollow armature shaft supplied with 5o iron wires E, preferablyin more than one layer. I have adopted two means of winding Theseinventions are thiswire, first illustrated in Fig. 5 in which all thewires are insulated, the exterior circle representing the insulation,the other in Fig. 6 where .each alternate wire is insulated the othersbeing bare, shown at E. In-this case it is preferable, though notnecessary, to make the bare wire of about the same size as the exteriorof the insulation of the covered wire E. In this case, also, a septum ofinsulation is placed between the two layers of wires, indicated at E.The extremities of the stationary mandrel C are supported in bracketsF,which may be either integral with the casing A or bolted thereto, bothforms being shown in Fig. 2, the bolted form being shown in Fig. 1. Uponthe armature shaft B is mounted the pinion F', which is organized toengage the gear F,which is mounted upon the axle G. In the case of Figs.1 and'2 this axle is the car axle G driving the car wheel. A journal Gencircles the shaft G and is carried in a segmental slot H of peculiarshape, the medial line of which forms the portion of the circumferenoeof a circle around the center of the mandrel C The slot is longer thanthe journal G which fits the slot only on its two lateral curvedsurfaces. Shruds are provided at H which guide the j ournallongitudinally and hold it within the slot. H H represent two elasticsubstances, or springs, one above and one below the journal and betweenit and the end of the slot. The two journals G are coupled so as to movesimultaneously and in the same direction. Fig. 2 illustrates one methodof accomplishing this result consisting of the segmental rack I formedupon vthe two journals adapted to co-operate with the pinions l whichare mounted upon the auxiliary axle I in housings J, fastened to thepart A of the motor. Fig. 7 illustrates an alternate form to accomplishthe same result. Two segmental racks J co-operate with two levers J Jfulcrumedon the motor frame at K K and attached to the journalsG atpoint K. L illustrates the commutator of the motor or dynamo as the casemay be and L indicates the shield which is fastened to the lower part ofthe body. A springL supports the machine at a point opposite the axle G,there being one both above and below the projection of the motorindicated by M. The

housings M containing the slot I-I are made preferably removable forobvious reasons. The dotted line at N indicates the height to which theshield rises.

The use and operation of my device are as follows: An electric machine,consists of a rigid frame-work combined with a more oi' less largequantity of copper wire which is cov ered with cotton thread used forinsulation and should not be subjected in whole or part to severe orsudden shocks or concussive blows. To avoid this action I mount themachine solely by elastic supports so `that it will not partake of thevibration of such supports. lVhen power is transmitted to or from ainachine so supported, by such a device, for instance as a spur gear, itbecomes necessary to keep the elements absolutely in alignment for theproper working of such gearing. It*

will readily be understood that to preserve suchalignment the change ofposition with` in the slots II of the journals G should be equal andsimultaneous. racks I, piiiions I and axle I, are for the purpose ofpreserving such parallelism of- Wherebiit one field coil as B' is useditlbef comes necessary to reduce the magnetic re-` luctance of the wholemagnetic circuit to a minimum. This I accomplish by presenting to thepolar surface the projecting teeth ris` ing from the armature core andfurthermore reducing so far as possible the reluctance of the air gapexterior thereto by filling the same with bands of iron wire which areinsulated to prevent the generation of currents therein, and are madesmall and morethan one layer is used.

It is preferable to use for a journal which is in such close proximityto the electrical parts of the armature as that shown at C, one whichrequires no liquid lubrication. The non-metallic sleeve C accomplishesthis result and does away with the necessity of any liquid lubrication.

To prevent dust from having free access to the end of the sleeve C Ihave provided a dust collar which consists in acap N, spring O andcollar made of the same substance as the sleeve C, all of which is`illustrated in Fig. a.

It will be observed that the stationar 7axes C being rigidly secured toeach of the brackets F form together with them aform of truss,

thereby strengthening the frame supporting the armature.

Another very essential feature will be noticed in the shortness of themachine, the

The segmental To remove the armature it is i journals being interior tothe armature. The boss upon the lower end. of the brackets D need beonly about one-third the dimension along the axis that would be requiredwere they replaced by journals.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is l 1. In an electric machine the stationary axle, arotating hollow armature shaft combined with a non-metallic sleevebetween the two forming a journal bearing therefor.

2. In an electric machine, the stationary axle, a rotating hollowarmature shaft combined with a non-metallic sleeve mounted within androtating with the armature shaft forming a bearing therefor.

3. In an electric machine, the stationary axle, a rotating hollowarmature shaft combined with a non-metallic sleeve between the twoforming a journal bearing therefor and brackets for supporting the axleexteriorto each end of the armature shaft.

4. In an electric machine, the stationary axle, a rotating hollowarmature shaft combined with a non-metallic sleeve between the twoforming a journal bearingtherefor,brackets for supporting the axle anddust collars applied to the ends of the armature shaft.v

5. In an electric machine,tlie stationary axle, a rotating hollowarmature shaft Scombined with a nonmetallic sleeve between` the twoforming a journal bearing therefor,"brack- `etstor supporting the axleand dust collars applied to theends of the armature shaft consisting inpart of a collar of non-metallic lubricating material similar insubstance tothe sleeve and requiring no liquid lubrication.`

6. In an electric `machine,whichis mounted solely upon elastic supports,power transmitting gearing connected with the rotating portion thereofin combination `with a device or devices independent of such gearingadapted to confine the alignmeutof the axcsof the gearing to parallelismin at least one plane.

7. In an electric machine which is "mounted solelyupon elastic supports,powerrtransmitting gearing requiringaligninent of axes for successfuloperation connected with the rotating portion thereof, in combination`witha device or devices independent of such gearing adapted to confinethe alignment of the axes of the gearing to parallelism in atleast oneplane.

S. In an electric machine mounted elastieally upon an axle, journalsupon the axle adapted to move up or down in guides upon the machine, aparallel motion coniiectionbetween such journals arranged to synchronizetheir motion in such guides,a gear upon such axle and a co-operatinggear mounted upon the rotating part of the machine.

9. In an electric machine mounted elastically upon an axle, journalsupon the axle working in guides upon the machine, a segmental rack uponeach journal `cooperating with pinions secured to a shaft extending ingonel pole piece and a cap for the U confrom one journal to the other,the shaft being mounted upon the machine.

l0. In an electric machine having but one 5 field magnet coil, aU-shaped forging forming one pole piece and a cap for the U consistingof a casting having the other pole-piece depending therefrom andprovided also with brackets integral therewith supporting the 1oarmature journal.

11. In an electric machine having but one field magnet coil, a U-shapedforging formsisting of a casting having the other pole-piece dependingtherefrom and provided also W1th I5 brackets integral therewithsupporting the armature journal and a single field coil Wound andsupported between the pole-piece and the cap.

ELMER A. SPERRY.

Witnesses:

J. B. MCGIRR, v

(1E.` HUNT.

